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A non-covalently modified carbon nanotube composite material of aromatic aldehyde/chitosan

A non-covalent modification, carbon nanotube technology, applied in the direction of carbon compounds, non-metallic elements, inorganic chemistry, etc., can solve the problems of harsh reaction conditions, damage to the rigid structure of carbon nanotubes, etc., to achieve mild reaction conditions, simple process, The effect of short preparation cycle

Active Publication Date: 2018-12-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Covalent modification generally requires concentrated sulfuric acid or concentrated nitric acid as an oxidant, the reaction conditions are harsh, and the rigid structure of carbon nanotubes is destroyed

Method used

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  • A non-covalently modified carbon nanotube composite material of aromatic aldehyde/chitosan
  • A non-covalently modified carbon nanotube composite material of aromatic aldehyde/chitosan
  • A non-covalently modified carbon nanotube composite material of aromatic aldehyde/chitosan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Chitosan pretreatment: take 1g of chitosan powder and place it in 20mL of alcohol solution, sonicate for 1h, and swell with magnetic stirring for 12h.

Embodiment 2

[0031] Example 2 Cinnamaldehyde grafted chitosan: measure cinnamaldehyde with a mass ratio of 4:1 in ethanol to the free amino group in the chitosan, the concentration of the mixed solution is 50%, mix well and add drop by drop into methanol solution of chitosan, reacted in a constant temperature water bath at 45°C for 8 hours, filtered with suction, washed with absolute ethanol three times, and dried in vacuum for 24 hours, and the product obtained was cinnamaldehyde grafted chitosan.

Embodiment 3

[0033] Characterization of chitosan grafted with cinnamaldehyde: Curve CS shows the infrared spectrum of chitosan, 3200-3600 cm -1 The broad peak is the overlapping peak of O-H bond stretching vibration peak and -N-H bond stretching vibration peak; 1642cm -1 It belongs to the stretching vibration of the C=O bond in the residual acetyl, which is the amide I band; 1600cm -1 Bending vibration belonging to N-H bond; 1153cm -1 and 1068cm -1 Stretching vibration at C-O-C; 896cm -1 is the structural swing peak of chitosan.

[0034] Curve CA shows the IR spectrum of cinnamaldehyde, 1681 cm -1 It belongs to the stretching vibration of the C=O bond in the aldehyde group, 1625cm -1 The weak peak is the stretching vibration peak of C=C bond, 1495cm -1 and 1449cm -1 The characteristic absorption peak of the benzene ring.

[0035] Curve CA / CS shows the infrared spectrum of cinnamaldehyde grafted chitosan, by comparing with chitosan infrared spectrum, it can be seen that the infrared...

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Abstract

The invention discloses an aromatic aldehyde / chitosan non-covalent modified carbon nano-tube composite material and belongs to the field of nano-material science. The method comprises the following steps: firstly, modifying chitosan by aromatic aldehyde to obtain aromatic aldehyde / chitosan cross-linking product, subjecting a carbon nano tube to non-covalent modification by the aromatic aldehyde / chitosan cross-linking product to obtain the carbon nano-tube composite carrier. The aromatic aldehyde / chitosan non-covalent modified carbon nano-tube composite material has good adsorption capacity on enzyme, meanwhile the enzyme activity can be kept at a high ratio, and the composite material has a wide application prospect in the field of immobilized enzyme carriers. The preparation method of the carbon nano-tube composite carrier material is simple in process, short in preparation period and mild in the reaction conditions, the requirement on equipment is low, the energy consumption is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to an aromatic aldehyde / chitosan non-covalently modified carbon nanotube composite material, which belongs to the field of nanometer material science. Background technique [0002] Enzymes are macromolecules with catalytic functions. Compared with inorganic catalysts, enzymes have the advantages of high catalytic efficiency and strong specificity. They are widely used in the fields of food, medicine, chemical industry and environmental protection. Compared with free enzymes, immobilized enzymes have a wider practical application space, and have the advantages of being reusable, good stability, and conducive to continuous and automatic production. The structure and performance of carrier materials have a great influence on the catalytic performance of immobilized enzymes. The design, development and preparation of carrier materials with better performance have become the focus of immobilized enzyme research. [0003] Carbon nanotu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/174
CPCC01P2002/72C01P2002/82C01P2004/04
Inventor 贾承胜刘威汪慧琪张晓鸣夏书芹
Owner JIANGNAN UNIV